It's nice but not essential I have dated quit a bit since leaving the Jehovah's Witnesses over the 17 years, I had two long term relationships in that time period (one was 3 and one 4 years long) neither women knew anything about the Jehovah Witnesses. One of them was raised as a Mormon but not practicing. That was interesting.
I'm currently "dating" a born in ex-JW woman I knew forty years ago. She left way back in the nineteen eighties. We get a long very well.
I guess love is were you find it. So finding an Ex-JW could be nice it's not imperative.